Flue Direct are experts in Twin wall Insulated flue! If you're looking to install a twin wall flue system into your home then we have everything you require to ensure your chimney system works for you. A twin wall flue is a double-walled flue pipe with insulation between the layers, designed to safely vent combustion gases from stoves burning wood, coal, gas, and oil. Twin-wall flues are commonly used for stoves and log burners that don't have brick chimneys and serve as a safe and long-lasting solution to release the gases from the wood burner. Installing a HETAS approved twin wall flue system from Flue Direct with a correctly designed flue route along with an Eco 2022 Design DEFRA approved stove will ensure a compliant and energy efficient stove installation. Buy Twin Wall Flue with Free Flue Design From Flue Direct, Fast Delivery, Call Us Now.